Active Single Column Pier Bridge Lateral Rigidity Performance Analysis

As the increasing of urban traffic,national has happened more than single column pier bridge collapse accident as a whole with the overloaded trucks driving under the condition of partial load.Based on the actual engineering examples,the author analyzes the single column pier capsized the most adverse selection,the influence law of single column pier lateral stability coefficient and discusses the longitudinal bike across the bridge of the biggest load using the standard formula of single column pier with different bridge span,bridge span number,radius of curvature,the pier bearing eccentric axis value by means of finite element software Midas.So as to improve the service life of the single column pier Bridges and safety coefficient of the bridge structure safety operation,and it has important theory value and practical significance.1.Theory and model is concluded for different bridge: The outside bearing attachment at the end side of straight line bridge is overturning axis.When there is no other bearing outside bearing attachment at the end side of curve line bridge,the outside bearing attachment at the end side of is the only overturning axis.When there is other bearing outside bearing attachment at the end side of curve line bridge,the middle bearing attachment is the only overturning axis.2.Analyzing stability of bridge with different bridge span,radius of curvature,the pier bearing eccentric axis value by means of finite element software Midas.In the same condition,as the increase of the radius of curvature,the stability coefficient of the curve bridge increase with the decrease of the first.The stability coefficient increase with the increase of span.Appropriate increase of bridge pier bearing eccentric value can enhance the single column pier lateral stability.3.Based on the actual engineering examples,this paper discusses the longitudinal truck across the bridge of the biggest load to provide relevant reference for the existing single column pier bridge operation stage now.4.With the engineering background of no.2 Lue Yang interchange ramp this paper analyzes stability of bridge and discusses the longitudinal bike across the bridge of the biggest load putting forward suggestions of longitudinal truck restrictions.